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DIGITAL PAINTING

The major aspects of digital painting explained and illustrated for artists and collectors



A COMPLETE SURVEY

Covers the major aspects of digital painting, written for artists, art students, art historians, galleries, curators, collectors and art lovers. For a brief overview, follow the link to:  DIGITAL PAINTING, a brief overview

Updated since 2013. Last update January 13, 2019

The information you find here draws on the experience of a handful of pioneering digital painters. It is independent, revenue-free, regularly updated, and offered without cookies. The text has been dedicated into the Public Domain by a CC0 1.0 universal license. You are free to copy, print and use it in any way you like. The images are protected by copyright.

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Definition
Visual characteristics
Differences in procedure
Double carrier
Prints only
Protecting originals and limited editions
Mainstream directions
Digital painting and photography
Size, resolution, enlargement
Vector and raster painting enlargement
About color
Texture
Quality-quantity convention, limited editions
Painterly development
Collecting digital art, assessment
Market for digital art
Certification
Links

Gallery of characteristics
Gallery of computer-generated paintings
Gallery of raster paintings
Gallery of vector paintings
Gallery of vector-raster paintings
Gallery of photo-based paintings
Gallery of preset styles and conversions

Definition


Definition

A 'digital' painting is created on the computer using a graphics program, a virtual paintbox with brushes, colors and other supplies. The definition applies to a painting on its primary digital carrier (as a computer file) as well as when it is transferred in a non-manual process to a secondary physical carrier (printed on paper, acryllic glass, aluminum, canvas, etc).

Visual characteristics

Visual characteristics

Apart from the traditional painting utensils, the virtual painting box contains instruments that don't exist outside the computer. The use of these instruments distinguish a digital from a non-digital painting. Typical visual characteristics can be traced back to the power of the computer to attach geometrical formulas to lines, shapes and forms. While it is impossible for a human hand to create exactly identical forms, or construct a perfect circle or a perfectly straight line, for a computer it is difficult to do anything but this. Formula-based shapes are easy to recognize by a degree of perfection that is literally inhuman. They bear some resemblance to traditional paper cut-outs or stencil art. Specific traits of digital painting include:

- Sharp, bold appearance
- Transparency
- Symmetry
- Regular distortion
- Exact repetition
- Perfect circles, squares and other shapes
- Embossing and other 3D illusion
- Perfectly smooth gradients
- 100% monochrome color planes

The flatness of the physical representation is also typical for the digital medium. Though the computer can be used to create a convincing illusion of texture on the virtual canvas, as yet this cannot be translated to real texture on paper, dibond, perspex etc.


Pauline van de Ven, Digital vector painting
Vector art with a raster shape in Ceci est un oeuf (2015)


Definition


Differences in procedure

In most programs it is possible to undo all or at least a generous number of brush strokes and other actions without a trace. Compared to traditional painting, where one wrong move can spoil the painting, the ‘undo’ feature allows a more spontaneous and intuitive method. Instant 'push button' transformations also make for quickness and spontaneity. On the other hand, one mainstream form of digital painting (vector painting) involves the manipulation of digital shapes with a specific tool, and this is a slower and more deliberate method than stroke by stroke painting.

Digital and physical carrier

Double carrier

When the digital artist is done, the painting is on the hard disk of a computer. In order to sell it, it will have to be transferred to a physical carrier like dibond, fine art paper, acryllic glass, etc. What happens to the primary digital carrier depends on how the artist wants to offer the painting. If the print is sold as an original, the digital carrier is either deleted or transferred to the buyer. If it is offered as a series, the artist deletes the digital carrier when the prefixed number of copies is sold. For an open ended series, the digital carrier remains on the hard disk of the computer. The buyer should always be informed about the status of the digital carrier.

Prints only

Prints only

Obviously, forms and shapes that are typical for digital painting cannot be transmitted to a physical carrier in a manual process. All the digital characteristics would be lost. The implication is often under-emphasized: a digital artwork, in its physical representation, is and can only be a print. If an artwork that was created on a computer is printed on a physical carrier and, as is often the case, painted over with real paint, the result is a 'traditional painting'. The original work on the computer still meets the definition of a digital painting.

Protecting originals and limited editions

PROTECTING ORIGINALS AND LIMITED EDITIONS

It is a common misunderstanding that a print cannot be a numerously unique work of art. It certainly can and often is. There are a number of ways, traditional as well as new, to effectively protect uniqueness and limited editions.

Precautions
The artist should carefully protect full-size, high resolution files of the artwork by choosing safe methods of transfer and sharing full scale files only with printing companies that delete them after use. Depending on the difference in scale between the original and the online image, raster and combined vector-raster paintings can be effectively protected by using low resolution and small size files for online display. Stronger measures such as DAM are needed to protect duplication and enlargement of online vector paintings.

Protection of the print (PAM)
PAM (physical asset management) consists of a manual signature and/or a unique mark both on the printed artwork and the certificate. The mark establishes authorship and protects prints from duplication. With a GS1 or EAN code an artwork (or any other product) is identified worldwide with a unique number. The number is translated into a small image, like a barcode or a datamatrix which can be attached to the certificate and the printed artwork. GS1 codes are issued in over 100 participating countries. Marks are placed on the back of the print.

Protection of the digital image (DAM)
DAM (digital asset management) is used to establish authorship of the digital image and to prevent it from being copied and used to produce prints and certificates without marks or with forged marks. A unique digimark is registered and invisibly embedded in the code of the image. Other than a digital watermark that is visibly placed over the image and which can easily be removed, the embedded digimark survives a variety of manipulations and transformations, even duplication by screenshot. Digimarks are optionally supplemented with a search service that permanently crawls the Internet tracing and reporting copies.

Leo Geurts and Lambert Meertens: Kristalstructuren
Computer generated art (code mode):
Leo Geurts and Lambert Meertens Cristalstructuren (1970)

Computer generated, raster, vector


Mainstream directions

Based on differences in method and appearance, four mainstream directions can be recognized.
1. Computer generated painting: Characteristics of digital painting are present. 
2. Raster painting: Characteristics of digital painting are absent.
3. Vector painting: Characteristics of digital painting are present.
4. Vector-raster painting: Characteristics of digital painting are present.

Karin Kuhlmann: In between

Computer generated art (design mode): Karin Kuhlmann: In Between 11 (2008)

Lev Stepanos: untitled
Raster painting: Lev Stepanos, Untitled (undated, ca. 2012)

Amparo Higon
Vector painting: Amparo Higón: Self portrait (2016)

Pauline van de Ven, Digital vector painting
Floating appearance of a large digital painting on Xpozer



Dolores Kaufman: Inner sanctum
Digital photo art: Dolores Kaufman, Inner sanctum (undated)

Digital painting and photography


Digital painting and photography

Over the centuries, artists have used a variety of tools to put the outside world on their canvas as raw material to be digested and molded into their own subjective interpretation. It is nothing new that painters use a camera. Still, the digital process does make a difference. To place existing images on a digital canvas and translate them into paintings now requires nothing but a push on a button. It brings subtle changes in painterly development (see below) and shifting boundaries between disciplines. A photographer now uses the same software for editing and transforming a photo as the artist for creating a painting. At the same time, digital painters start to use the flat physical carriers that were developed for photography. The shared toolbox establishes a transition zone between photography and painting. Essentially this is a transition zone between recording and creating images. Classification is not always easy if a photo is used as input in a genuinely creative process (as opposed to push-button transformations). If photographic aspects dominate it is usually classified as 'digital photo art' or 'new photography'. If painterly aspects dominate as a ‘digital painting’.

File formats

Picasso
Picasso: Woman with a blue hat
(Enlarge to see the effect of a 300 pct. resize of a raster image)

Size, resolution, enlargement


Size, resolution, enlargement

When the artist increases the height and width of an existing image, its resolution - or information density - decreases and it will become vague. Resolution is usually expressed in 'dpi' (dots per inch). While the image on the screen already looks sharp at the standard resolution of 72 dpi on the web, a physical carrier needs 300 dpi or more. In addition, the physical carrier is often much larger in height and width as well.



Bonnard
Two enlarged fragments of Pierre Bonnard's Getting out
of the bath
(1930) (zoom in)
 

Correction of raster painting enlargement

Vector and raster painting enlargement

For a vector painting, where colors and lines are controlled by formulas, enlargement requires nothing but a push on a button. There is never a loss of resolution. For raster painting, information will have to be added to fill in the gaps. Usually this is done with the help of enlargement software or by the 're-size' option in the painting program (step 1), followed by a manual correction (step 2). In recent versions of raster painting software, 'scripting' offers automated enlargement without loss of resolution.

Although much progress has been made in non-scripting enlargement, it remains difficult to fill in the empty space between handmade lines and shapes. Lines become unsteady and crumbly and unintended 'noise' appears along the edges of color patches. The image above shows two different types of online enlargement of the same fragment of Pierre Bonnard's Getting out of the bath. Note that each method entails its own noise and deformation.

In order to eliminate deformation, automatic enlargement is usually followed by manual correction. This is not something to go about lightly. Depending on the speed of the computer and the chosen size and resolution of the image, correction can be slow or even come to a halt. The screen, of course, is not enlarged: the artist can no longer see the whole image and will have to zoom in and out frequently, switching between corrections and reviewing the results.

Scripting
Recently, several programs for raster and hybrid painting introduced ‘scripting’: all strokes and actions are recorded and can later be repeated without loss of resolution on a larger digital canvas on the desktop. Scripting is a considerable improvement: by making the canvas flexible it clears the backlog for raster painters when it comes to printing. Compared to vector painting, the remaining disadvantage is that substantial enlargement of a pixel-by-pixel canvas generates much larger files. Depending on the hardware these can be difficult to handle.


Pauline van de Ven:Anna
Left: faithful online color representation with the sRGB color profile
embedded Right: A green cast with a profile for printing embedded

About color

About color

What can be done to see and to represent colors reliably? Let's look at different purposes in the digital environment:  

To see colors
Every computer screen deviates to some degree from the 'true' color values that is set as a standard by the international color convention (ICC). These deviations are corrected by a calibration of the screen. For anyone working with colors it is absolutely necessary to regularly calibrate. This is done with the help of a small device that is attached to the screen. It calls up a number of colors, compares them with the standard and creates a monitor profile. This unique piece of software corrects the screen of the individual computer and is automatically installed as the default. It runs silently in the background. Its only task is to correct the monitor. Although, confusingly, this monitor profile is listed between a whole range of optional profiles for printing, apart from a regular update it should be left alone. It is never embedded in an artwork.

To create colors
In professional desktop painting software, the basic profile types have their corresponding palettes and matching color spectrum in the workspace. It is advisable to work in the palette and the spectrum that matches the destination - CYMK for printing, RGB for online display and grayscale for black and white. Changing between RGB and CYMK profiles is not (yet) possible  on mobile devices. Paintings have the RGB profile embedded.

To display and print colors
The artist should embed a color profile in the finished artwork that matches one of two destinations: a webpage or a printing company. This is important because the color palette for printing is much smaller than the average palette of a computer screen. If the artist sends a painting to the printer that has the RGB profile for online display embedded, many colors that are not available will in some automatic process be translated to a nearest neighbour. The result can be a costly disappointment.
This is especially relevant for painters working on mobile apps because they have the RGB profile standard embedded in their artworks. If the work is to be printed, colors should be converted to a CYMK printing profile. This is done in a desktop painting program. As a rule the printing company supplies his own profile that is tailored to his machinery, ink, choice of paper etc. He can also prescribe one of the many CYMK profiles that are available in most computers. Some printing companies accept files with the RGB profile and convert them to their own CYMK profile.

Colors in browsers
Most of the colors we see on the screen are interpretations by browsers and apps. Only a hard core of 216 colors is standardized between browsers. The artist who aims to avoid online color deviation entirely, has the option to use the 'web safe color palette'. This seriously limits the choice of colors. Even then, small differences  occur.

In conclusion, three things are needed to see and to represent colors reliably:
(1) If you are using a desktop computer your screen should be calibrated.
(2) If possible, the artist should work in the color palette that matches the destination. If this is not possible, RGB is the larger palette and the safer choice.
(3) When finished, a color profile should be embedded in the artwork that matches the destination (either RGB for a digital destination or CYMK for a printing company).

Digital texture
Illusion of texture in a detail from August im Lauerzersee by Caroline Weber Fischer

Texture

Over the centuries art lovers have felt the hand and mood of the painter in brush strokes and paint. Many find that a painting without texture is fine in a book, but doesn't feel right on the wall. Though a stylus can be as sensitive to the pressure of the hand as a traditional brush, and the pressure can be made visible on the screen, a digital painting is entirely flat. Some artists project their work on a physical carrier and paint it over, using the computer as a preparatory device and sacrificing the digital characteristics. Others apply brushstroke gel to the physical carrier. Yet others have chosen to accept flatness as a necessary property of digital painting at this stage. Some emphasize it in appreciation of the minimalistic appearance.

Quality-quantity convention, limited editions

In traditional painting, the numbering of a limited edition by convention follows a quality/quantity notation 'i/n' in front of the artwork. Where 'i' indicates a rough ranking of the individual print according to technical and aesthetic quality and 'n' is the size of the edition. Since all prints of a digital artwork are identical, 'i' has no other meaning than to let a buyer know how many prints are still available. The meaning of 'n' is still the same: the size of a limited edition has economic significance for collectors. As in traditional painting, the size of 'n' is set by the artist prior to the first sale. The artist keeps register of the number of copies that are sold. Open series are referred to as '∞ ', and numerically unique prints as '1/1'. In the automated printing process, the unnumbered run-up prints that are traditionally labeled as 'E.A.' (epreuve artiste) or 'A.P.' (artist's proof), can still occur.

Painterly development

A great variety of tools give the digital artist exciting new means to express thoughts and feelings. On the negative side, the more the computer facilitates the work of the artist by offering easy imports, taking over painting processes and offering, sometimes even imposing, a wide array of styles, the more difficult it becomes for painters to develop their own idiom, to take distance from images that are already there, and to make the voice of the computer secondary to their own.

Choice of software
Painting software has a decisive influence on the style of any artist. A change of program inevitably makes for a change in style. Once a considered choice has been made, the artist should only change it with good reason.
It has advantages to use software from established companies with large artist communities. Such companies are more likely not only to adapt their software to new hardware but also offer backward integration. Without this, paintings eventually get caught in a version of an app that is tied to older hardware, with no possibility to get them out or print them larger than a stamp. Many raster painters experienced the loss of years of work that became trapped in Brushes, a small open source program and one of the most popular painting apps ever. Artists develop their own style in an ongoing process of interaction with the software, so when the software has to be discontinued this investment too will be lost.

Collecting digital art, assessment

Collecting starts with looking. Unfortunately, browsing the huge amount of online portfolios is not as easy and pleasant as it could be. There is a great deal of room for improvement in search algorithms. At some of the worlds largest online galleries, collectors are flooded by very similar computer generated images that are made by only a few painters. If they tire from so much homogeneity and decide to resume another time, they will have to wade through these images again. Some galleries lower the resolution as well as the size of images to speed up browsing, thereby depriving collectors of the far more time-efficient method of judging paintings at first sight. And not withstanding the major visual differences of the mainstream painting directions, many search engines do not allow to filter on ‘raster’, ‘vector’, ‘hybrid’ or ‘computer generated’ digital art. Primary aspects like resolution or the number of prints of a limited edition that is still available are often not mentioned in the description.

The used software is also rarely mentioned. In order to appreciate originality and technical skill, collectors need to know which program the artist has used to create the painting. Without this, it is impossible to distinguish what comes out of the app from what comes out of the artist. (Visit Ben Guerette's A Blog appArt for a wild variety of styles and technical skills that are a property of the software.)

Although many online galleries offer reliable visual information about the resolution with a online 1:1 detail of an artwork, the look and feel of the painting on its carrier cannot be assessed online. Colors to some extent vary with the carrier and the type of screen, so they too remain difficult, even if the collector’s screen is calibrated.

The best way to judge a digital painting is to ask the artist for a miniature sample. It should be printed on the chosen carrier and executed with the same resolution. This is an easy and inexpensive way to obtain all the relevant information to make a decision.

As is true for traditional painting, it is always important to buy at a trusted party. While most digital painters are still alive, paintings can be bought directly from the artist or at online galleries where they show their portfolios.

Market for digital art

The market for digital art is gradually maturing. Collectors start to realize that digital painting is a new visual language that can't be expressed with traditional means. Many problems have been solved. Color representation has become fairly reliable thanks to the use of color profiles and calibration. Digital and physical asset management and a responsible handling of digital files have brought the risk of duplication down to an acceptable level. Slowly but steadily, digital paintings are finding their way to museums, auctions and galleries where they meet a new generation of collectors.

Yet, many highly professional, even pioneering digital painters still have no idea how to get their work out of the computer and up on a wall. Most rely on an online gallery to offer prints of their work. Large online galleries offer an abundance of originals and quality prints worldwide with good sales conditions. Although this relieves artists of a host of technical concerns, there are also some serious disadvantages. If the printing is left to the gallery and the print sent directly to the collector, the artist can no longer evaluate and if necessary adjust the (color) representation. Physical asset management including a manual signature is likewise not possible. And finally, the computer of the artist is also no longer the only location where a high resolution file of the painting is stored. Analogue to the protection of author's rights for books, it is to be expected that online galleries will presently take over the digital and physical asset management from the artist.

Certification

A certificate is important in physical asset management (PAM). It bears a mark of identity such as the signature of the artist or a personalized sign, watermark, bar code, fingerprint or hologram which matches an identity mark on (or in) the artwork. The document contains a copyright declaration, distinguishes between an original and an open or closed edition, states the size of a limited edition, binds the artist to deletion of the digital carrier after the sale, and conditions the display of the artwork after it is sold.  A Certificate of Unicity for a numerically unique print ('original' or '1/1') a Certificate for a Limited Edition and a Certificate for an Open Edition is regularly updated and freely available on this site.

LINKS

Brushstroke gel:  Water-soluble acrylic polymer containing a UV inhibitor which helps protect the art from yellowing and fading. Also used to recreate brushstrokes on digital paintings printed on canvas. http://www.artandframingsolutions.com/BrushstrokeGel.htm

Blogs:
Don Archers blog, Digital art, artists and commentaries

Color calibration:
General information
Spyder calibration sensor

Carriers for digital painting:
Xpozer, Prints on polyester coated paper, floating, unframed mount (sRGB profile accepted)
Whitewall, Prints on Hahnemuele paper, canvas, brushed aluminum, dibond, perspex, (printer's color profile supplied, sRGB profile excepted)
Drukwerkdeal, Postcards, large format prints on dibond and brushed aluminum, and postcards (printer's color profile supplied)

Certificates:
Certificates, For original, limited and open edition

Conversion:
Automatic conversion, photos to paintings, drawings and cartoons
Waterlogue, Automatic conversion of photos to paintings, drawings and cartoons

Enlargement, digital:
Many programs listed
Oneone perfect resize, (enlargement correction)
ZoomPro5, Ben Vista

Enlargement, manual (projection of physical and digital image on walls, canvas etc.):
artograph
beamers (choose a led beamer to work in daylight)


Fractal art:
Fractal art, video1
Fractal art, video2
Fractalart

Galleries, online:
Absolute Arts
Flickr
Gaac
MOCA
Saatchi online

Galleries, physical:
Agora
West 25th Street, New York, NY)
K16
Keizersgracht 16, 1015 CP Amsterdam, NL)

Hand painted copies:
Dafen Village, China:  
By artist, style, size

Mark, barcode, digimark, hologram (print and digital image protection):
Barcode registration GS1
Digimark (invisibly embedded watermark with tracing option, a Photoshop plug-in)
Security hologram

Museums:
MOCA  Museum of Computer Art (MOCA) of New York State University offers emerging directions in digital art an online platform since 1993. Annual competition in digital art, catalogues.

Photo art:
Flickr

Programs for painting on iPad and iPhone:
Brushes (raster)
Adobe Eazel (raster) (no undo option)
Adobe ideas (vector) (in combination with Adobe Illustrator)
Paintbook Penultimate
ArtRage (has scripting)
Procreate (maximum canvas depends on device. iPad Pro 16,384 x 4,096)
Inkpad (vector, open source)

Programs for painting on PC and Mac:
Overview
Adobe Photoshop CS6
Corel drawing

Programs for fractal painting:
Fractal Arts

Programs for vector painting:
Overwiew of vector programs and file formats
Adobe Illustrator
Adobe ideas (iPad) (in combination with Adobe Illustrator)
Inkpad (iPad/iPhone) (open source)
Inkscape(open source)
Photoshop.com
CorelDraw for Windows

Registration:
For artwork on paper

Style:
A Blog appArt, An overview of styles and features of apps and painting software by Ben Guerette

Vector art: 
vector art, video
Pno expo
Blood sweat vector

Vectorization, online (raster to vector conversion):
Vectormagic
Autotracer


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WHAT'S NEW?

2018/12/18 Update of 'Protecting originals and limited editions'

2018/11/28 The text is corrected and modified

2018/03/13 The text is dedicated into the Public Domain

2017/09/13 New certificates published (version 5.0)

2017/08/30 Update of 'characteristics'; 'uniqueness and limited editions'; 'links'

2017/08/22 Update of 'detailed survey'

2017/08/14 Update of 'brief overview'

2015/08/08 New certificates: (v.4 for originals, v.1 for editions)

2015/08/06 Major update 'Market for digital art'

2015/08/03 'About color'

2015/05/21 'File formats'

2015/05/01 'Pioneering digital artists'

2015/04/25 'Visual characteristics'

2015/04/19 'Assessment'


PIONEERING DIGITAL ARTISTS